Compressor for rail-bonds.



No, 840,524. PATENTED JAN. 8, 1907.

0. R. STURDEVANT.

COMPRESSOR FOR-RAIL BONDS. APPLICATION FILED AUG. 10, 1905.

a, l i I and usefullmprovements in Compressors for I the type known as aUNITED STATES PA ENT oi ErOEf" CHARLES STURDEVANT, OF WOROESTEMASSACHUSETTS,.ASSIGNOR TO THE AMERIOAN STEEL & wrRE OOMPANY OF NEWJERSEY, OF WO OESTER, MASSAOHUSETTS, A OORPORATION OF NEW JERSEY.

COMPRESSOR FOR RAIL-BONDS.

Specification of Letters Patent. Application fil d August 10, 1905.Serial No. 273,623.

No. 840,524. Patented Jan. 8, 1907.

To all whom it may concern: rail-web. Fig. 2 is a like View, showing theBe it known that I, OHARLEs R. STURDE- relation of the parts of theapparatus in the VANT, a citizen of the United States, residing I finalstage of compressing the terminal stud. at Worcester, county ofWorcester, State of l Referring to the drawings, a 1ndicates; theMassachusetts, have invented certain new ram or plunger of a compressor,preferably of screw compressor, Rail-Bonds and I do hereby declare thefolwhere the plunger turns as t is forced against the ram or plunger.

My invention relates to rail-bond com- The end of the plunger ispreferably pressors, especially revolving-screw comformed with an enddef reduced cross-secpressors, and has for its object to provide thetional area slightly longer than the finished ram or plunger of acompressor with a springcrown of the rail-bond terminal. Slidablypressed sleeve normally projecting beyond and rotatably mounted on thereduced end 12 the plunger end to engage the rail-bond ter- I is asleeve 0. In order to hold the sleeve minal, so that the weight of-thecompressor upon the plunger end and permit a limited is supported by theterminal, the necessity of sliding movement of said sleeve, the latteris ding a centering spur for the plunger is obviated, the crown of theterminal-is drawn I ends of a transverse pin e, passed through forciblyinto engagement with the web of the I the end of the plunger, and therecess (1 is rail, and the upset end of the terminal is coni madeannular in order to prevent the breakfined within the space included bythe pluning of the pin e when the sleeve is filled with ger-face and theprojecting sleeve end. The the surplus metal of the terminal. This iseffect last mentioned is of particular imporan important feature,because, as will readtance, in that as compression of the terminal 5 ybe understood, the plunger turns as it is is carried to the desiredlimit the metal of forced against the terminal, and when the theterminal is forced out over the rail-surend of the terminal has beenspread laterally, face adjacent the terminal-receiving hole, so as tofit tightly in the sleeve, the sleeve can and the amount of the overflowis limited by no longer turn, and unless the sleeve and the projectingsleeve, resultin in several disl plunger be relatively rotatable the pinmust tinct advantages, among who may be menbreak whenever the rotationof the sleeve is tioned the following: A practically perfect preventedby the jamming of the upset end head is formed on the upset end of thetermiof the terminal in its mouth. nal, less of the total energydeveloped is ab- Surrounding the sleeve 0 and confined besorbed incompressing the copper between tween a flange c thereon and the shoulderat the rail-surface adjacent the hole and the the junction of the largerand smaller porend of the ram, and a correspondingly larger tions of theplunger is a stout helical spring f, portion of the energy is availablefor comwhich serves to hold the sleeve 0 in its expressing the copper ofthe terminal into the treme outer position on the plunger end, sohole,and therefore improving the contact I that the collar forms, with theface of the between the terminal and the walls of the p unger, a cavityto receive the end of the hole in the rail, and as the end of theterminal I rail-bond terminal. in the upsetting operation expands in theThe mode of applying and operating'the sleeve the ram or plunger centersitself. l device, as hereinbefore described, is substan- In theaccompanying drawings, Figure 1 is tially as follows: The rail-bondterminal t is a side elevation of the ends of the anvil and l insertedin the hole drilled in the web of the plunger of a compressor, showingthe collar l rail :20 and the compressor applied, as in Fi and itsspring in section, the apparatus being 1, by bringing the anvil gagainst the head 8 illustrated as in the preliminary stage of comof theterminal and adjusting the plunger a, pressing a rail-bond terminal inthe holeof a 1 so the its face lies adjacent to the end of the terminalto be upset and the sleeve 0, surrounding the projecting terminal end,thereby serving to support the weight of the compressor upon theterminal to properly center the plunger on the terminal, avoiding theuse of a centering-spur on the plunger. As pressure is applied to theram or plunger at the beginning, the crown s of the terminal is forcedfirmly against the surface of the railweb so by the action of spring f,thereby insuring good contact at this point. This serves the purpose ofthe outer screw in'the ordinary form of hand screw compressors. As thecompression is carried farther'the metal in the 'termina'l end is forcedby the plunger to flow out over the surface of the rail web surroundingthe hole, and as the amount of such overflow is limited or restricted bythe inner walls of the sleeves it will be apparent that less oii'tliie'-energ-y developed wilhbe expended in compressing the metal of theterminal b'etweentheplunger end and the adj acentrail-surface, and a correspondingly large portion ofthe energy is available for forcing. andcompressing the copper into the hole, and thereby improving the=contactbetween the terminal and the walls of the hole and atthesame timeforming a practically perfect head tfromthe upset metal of the'termina-Lwhich is forced into intimate contact with the side of the web 1;.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

In a compressor for applying rail-bond terminals to conductor-rails, thecombination of a plunger, having a reduced and b with an operating-faceof substantially the same area as the head t5) lie formed onltheterminal, a springress e s eeve c encirc in the lun er endfii'ri dhavingan internal di amet dr relatively proportioned to that of the terminalto limit the lateral spread of metal in the terminal end, anannularrecess don the inside of the sleeve, a pin 6 passing transverselythrough the end of the plun er'with its ends projecting into therecess,- t "e sleeve c"proj ecting normally beyond the end of'theplunger, the recessd'being wide enough to permit the sleeve to have alimited sliding movement'on the plunger end, and the annularrecesspermitting relative rotation between the sleeve and the plunger.

In testimony whereof I affix my-signature in presence of two witnesses.

CHARLES R; STURDEVANT Witnesses-'2 WM. A. BACON, CHAR-LES F. GARL'AND'.

